In this file photo, supporters of Chavis Carter and his family hold signs during the candlelight vigil held in honor of Carter at the First Baptist Church in Jonesboro, Ark. Carter was shot in the head while his hands were cuffed behind him in an Arkansas patrol car. An autopsy report released Monday lists Carter's death as a suicide.

LITTLE ROCK, Ark. — A man police say shot himself in the head while his hands were cuffed behind him in the back of an Arkansas patrol car tested positive for methamphetamine, anti-anxiety medication and other drugs, according to an autopsy report released Monday that listed his death as a suicide.

The state crime lab report said the muzzle of a handgun that Chavis Carter apparently concealed from arresting officers was placed against his right temple when it was fired. The report, signed by three medical examiners, included a drug analysis showing Carter's urine and blood indicated methamphetamine and other drug use.

The report, released to The Associated Press and other news organizations under a Freedom of Information Act request, said Carter's blood also tested positive for at least trace amounts of the anti-anxiety medication diazepam and the painkiller oxycodone. His urine test also returned a positive result for marijuana.

The report said Carter's death was ruled a suicide based on autopsy findings and investigative conclusions from the Jonesboro Police Department, which has faced questions from Carter's family and community members about the circumstances surrounding the July 28 shooting.

"He was cuffed and placed into a police car, where apparently he produced a weapon, and despite being handcuffed, shot himself in the head," the report said.

Benjamin Irwin, a Memphis, Tenn., lawyer representing Carter's family, declined to comment on the specifics of the toxicology report, calling instead for police to release details of any gunpowder residue or other such tests.

"If those tests were taken ... what were the results?" Irwin asked.

On Monday night dozens of Carter family supporters gathered outside the National Civil Rights Museum in Memphis, Tenn., for a candlelight vigil.

Carter's mother, Teresa Carter, wiped her eyes as people spoke about her late son.

"My heart is heavy," she said.

Police have said officers frisked Carter, 21, twice after a traffic stop without finding a gun before he was fatally shot, but the department's internal investigation continues. The FBI also is monitoring the case, and the local branch of the NAACP has called for a thorough investigation into the death of Carter, who was black. Two other men who were in a truck with him during the stop and the two officers who were on the scene are white, according to police.

The autopsy report comes days after police released dashboard camera video recorded the night Carter was shot in Jonesboro, about 130 miles northeast of Little Rock. Part of the video showed Carter being patted down and ended before officers found Carter slumped over and bleeding in the back of a patrol car, as was described in a police report. Police later released additional video they said was recorded after Carter was found.

Neither included the moment they say Carter shot himself, and the footage did little to resolve questions about how the shooting could have happened. Jonesboro police previously had released a video reconstruction of the shooting showing how a man could shoot himself in the head with his hands cuffed behind him.

In producing that video, the agency said it used the same type of handcuffs used on Carter and the same model of handgun found near him after he died: a .380-caliber Cobra semi-automatic. An officer of similar height and weight as Carter sat in the back of a cruiser, leaned over and was able to lift the weapon to his head and reach the trigger.

The autopsy report said Carter was about 5-foot-8 and that his body weighed 150 pounds.

Irwin called Monday for the full dashboard video and audio from the night of the shooting to be released before final conclusions are drawn.

"They should be disclosing every bit of evidence as quickly as they can," he said.

"As the investigation continues and as prudent further information will be released," Waterworth said in an email. "Any other questions will be answered upon completion of investigation."

Carter's death came after police stopped a truck in which he was riding. The driver and another passenger eventually were allowed to go, but police said Carter had an outstanding arrest warrant. Court records show it had to do with a drug charge out of Mississippi's DeSoto County.

Carter was searched twice, and police said they found a small amount of marijuana, but no gun. After the first search, an officer put Carter into a patrol car without handcuffing him. He was later searched again, handcuffed and returned to the same car.

"It's obvious they did miss the weapon on the first search. It is likely, since he was placed into the car un-handcuffed the first time, that he had an opportunity to stash the weapon in the car," Jonesboro Police Chief Michael Yates said last week. "The second search, which was more thorough and inclusive, did not disclose the weapon either."

Officers a short time later saw Carter slumped over in the backseat and covered in blood with his hands still cuffed, according to the police report, which concluded he had managed to conceal the handgun with which he shot himself. He later died at a hospital.